[Tkinter] how to get the entry information using Entry.get() ?

[woooee]

You have to keep a reference to each individual Entry, in this case x. Each pass through the for overlays the previous x, so it no longer exists. So, using a dictionary below, so you can store everything in one container

## NOT tested - don't have time
## post back if there are problems

        self.entry_dict={}
        for x in self.listeF:
 
            ##global  entree
 
            ## don't have to keep a reference to the Label
            ## since it isn't accessed anywhere else
            Label(self.fenetre, text=x, bg='#cecece',
                  fg='black').grid(row=1, column=2,
                  rowspan =  R_span, pady = R_pady, sticky = W)
            y = Entry(self.fenetre, bg='black', fg='white')
            y.grid(row=1, column=3, rowspan=R_span, pady=R_pady, sticky = NW)
            self.entry_dict[x]=y
        print("entry_dict", self.entry_dict) ## self.listeF item --> tkinter instance

    def Entree_Get(self):
        for x in self.listeF:  ## read the dict in this order
            print(x, self.entry_dict[x].get())